Improvement in mandfaotubing bolstee-plates



@uitrit taies gamut @ffice WILLIAM J. LEWIs AND HENRY W. OLIVER., JE., 0E PITTSBUEG, PENNSYL- f VANIA.` f

' Leners Patent No. 79,237, and Jun@ 23, 1868.

IMPROVEMENT IN MANUFACTURING BOLSTER-PLATES.

'ro ALL WIIoM IT MAY c oNcEnN:v

Be it known that we, WILLIAM J. LEWIS and HENRY W. OLIVER, Jr., of Pittsburg,`in thev county of Alle' gheny', and State of Pennsylvania., have invented a new and useful Improvement in Bolster-Piates; and `we do hereby declare that the following is a full and exact description thereof, reference beingliad to the accompanying drawings, and to thclctters and figures of reference marked thereon.

The nature 'of our invention consists in rolling a bar of iron, so as to constitutefa series of blanks for bolster-plates, of the form hereinafter described. i i

To enable others skilled in the art to make and use our invention, .we will proceed to describe its construction and operation. Y

In the accompanying drawings, which form part of our specification, Figure lis a face view of a section of 'a bar of iron rolled out into the desired form for our improvement in bolster-plates.

Figure 2 is a transverse section (full size) of our improvement in bolster-plates. Figure 8 isa longitudinal section of the bolster-plate, and represents the relation of the two parts of it to the bolster and axle of ,the wagon. l

` In constructing our new article of manufacture, viz, bolster-plates, we roll .the iron out .into bars of the desired length," and of the formv represented in the accompanying drawings, which we accomplish by making grooves and recesses in and elevations on the rolls, corresponding to the indentations and elevations in the bolster-plates. I Y y K In the drawings, A represents the male and B the female parts of the bolster-plate. The elevation C in the plate Aiis tted to a recess,l D, in the plate B. lhe indentations 1 and 2are guides, for punching out the openings for the king-bolt. The indentations 3 are guides for making the bolt-holes, for securing the platos,

to the bolster and axle of the wagon.

The indentations represented by lines X are guides for cutting off the plates at proper lengths. c represents anges, which are used for the purpose of preventing the plates from moving sideways on the bolster and axle of the wagon. i

The advantage of our improvement consists in producing, by rolling, a continuous series of blanks for bolsterplates, of wrought iron, which are of great strength, very durable, and cheap. A

Having thus described the nature and construction of our improvemcntLwhat we claim as of our invention, is l new article of manufacture, viz, iron bars rolled to the shape of a connected series of blanks for bolsterplates, substantially as herein described, and for the purpose set forth.

s WM. J. LEWIS.

HENRY W. OLI-VER, JR.

Witnesses:

JAMES J. JOHNSTON, A. C. JOHNSTON. 

